[Linux-cluster] Antwort: Re: clvmd does not create vgs

Michael st0rm2oo3 at yahoo.de
Fri Mar 12 07:08:14 UTC 2010 

Hi,

yes, /dev/VolGroup00/storage is a LV. This is our DRDB device. We configured DRDB as dual primary. So /dev/VolGroup00/storage is equal on both nodes. In serveral Documentations they said that you have to create a pvs/vgs/lvm on DRDB device to use gfs. So this the point where we got stuck. The DRDB Device is in sync. So no problem in this configuration. But when we try to create a pv on the device (actually the lv) this doesnt work. I thought if i create a pv/vg/lv on one node, its automatically created on the second node. Is this right?

Best regards




________________________________
Von: brem belguebli <brem.belguebli at gmail.com>
An: linux clustering <linux-cluster at redhat.com>
Gesendet: Mittwoch, den 10. März 2010, 20:02:04 Uhr
Betreff: Re: [Linux-cluster] Antwort: Re: clvmd does not create vgs


It looks there is something I didn't catch from your messages, among them I think I missed the DRBD thing.
 
The /dev/VolGroup00/storage are physical devices (pv's) ? 
 
Strange naming as it confuses me to have a VG (VolGroup00) name in it, I tend to read this naming as being a LV (storage being a LV in VG VolGroup00...).
 
Anyway, if possible to have such names for PV's, are you saying that they are different physical devices on each nodes, the one on node1 being the source device of your DRBD setup and the one on node2 being the destination of your DRBD setup ?
 
I don't know much DRBD to help you, but were you expecting DRBD to create the VG storage automatically on the destination PV on node2 ?
 
Brem
  
 
 
 


 
2010/3/9 Michael <st0rm2oo3 at yahoo.de>

Hi,
>
>vgchange -ay didnt help. Here is the output from pvs on both nodes 
>
>[root at node1 ~]# pvs 
>
>
>  PV                      VG              Fmt  Attr PSize   PFree
>  /dev/VolGroup00/storage storage_cluster lvm2 a-     1,14T 1,14T 
>
>
>  /dev/sda2               VolGroup00      lvm2 a-   557,62G    0 
>  /dev/sdb1               VolGroup00      lvm2 a-     1,09T    0 
>
>[root at node2 ~]# pvs 
>
>
>  PV                      VG         Fmt  Attr PSize   PFree
>  /dev/VolGroup00/storage            lvm2 --     1,14T 1,14T
>  /dev/sda2               VolGroup00 lvm2 a-   557,62G    0 
>  /dev/sdb1               VolGroup00 lvm2 a-     1,09T    0 
>
>/dev/VolGroup00/storage is my drdb device. I created it on different vg.
>
>
>
>
>
>
________________________________
 Von: brem belguebli <brem.belguebli at gmail.com> 
>
>
>An: linux clustering <linux-cluster at redhat.com>
>Gesendet: Montag, den 8. März 2010, 18:04:28 Uhr
>Betreff: Re: [Linux-cluster] Antwort: Re: clvmd does not create vgs
> 
>
>
>Hi,
> 
>On node1, you created the pv /dev/drbd/by-res/repdata (pvcreate) and added it to VG storage_cluster  (vgcreate ....).
> 
>On node2, as long as the device /dev/drbd/by-res/repdata  is accessible, a simple vgscan would discover the newly created pv and vg.
> 
>If there was a locking issue, it would complain on node2 that it couldn't activate any LV from  storage_cluster.
> 
>Can you post the output of pvs on node2 ?
> 
> 
>This is how it works for me
> 
>Brem
>
>
>2010/3/8 Bernd Giese <bernd.giese at warburg-invest.com>
>
>
>>vgchange -ay on both nodes
>>
>>
>>
>>
>>brem belguebli <brem.belguebli at gmail.com> 
>>Gesendet von: linux-cluster-bounces at redhat.com 
>>08.03.2010 13:49 
>>Bitte antworten zu 
>>
>>
>>linux clustering <linux-cluster at redhat.com> 
>> An linux clustering <linux-cluster at redhat.com>  
>>Kopie 
>> 
>>Thema Re: [Linux-cluster] clvmd does not create vgs 
>>
>>
>> 
>> 
>> 
>> 
>>
>>
>>
>>have you tried to pvscan/vgscan on node2 after creation on node1 ?
>>
>>
>>2010/3/8 Michael <st0rm2oo3 at yahoo.de>:
>>>>> no suggestion?
>>>
>>> Thanks
>>>
>>>
>>>
>>> ----- Ursprüngliche Mail ----
>>> Von: Michael <st0rm2oo3 at yahoo.de>
>>>>> An: linux-cluster at redhat.com
>>> Gesendet: Donnerstag, den 4. März 2010, 11:12:51 Uhr
>>> Betreff: [Linux-cluster] clvmd does not create vgs
>>>>>
>>> Hi,
>>>
>>> we are curenty using cman, clvmd and drbd. The problem occurs when we want to create volume groups. DRBD shows that both nodes are UpToDate. So first I try create a Physical Volume:
>>>
>>>>> [root at node1 log]# pvcreate /dev/drbd/by-res/repdata
>>>  Physical volume "/dev/drbd/by-res/repdata" successfully created
>>>
>>> [root at node2 tmp]# pvs
>>>  PV                      VG         Fmt  Attr PSize   PFree
>>>>>  /dev/VolGroup00/storage            lvm2 --     1,14T 1,14T
>>>  /dev/sda2               VolGroup00 lvm2 a-   557,62G    0
>>>  /dev/sdb1               VolGroup00 lvm2 a-     1,09T    0
>>>
>>> Well, /dev/VolGroup00/storage created on both nodes. Fine. Next I want to create a Volume Group:
>>>>>
>>> [root at node1 log]# vgcreate storage_cluster /dev/drbd/by-res/repdata
>>> vgcreate storage_cluster /dev/drbd0
>>>  Clustered volume group "storage_cluster" successfully created
>>>
>>> [root at node1 log]# vgs
>>>>>  VG              #PV #LV #SN Attr   VSize VFree
>>>  VolGroup00        2   3   0 wz--n- 1,63T    0
>>>  storage_cluster   1   0   0 wz--nc 1,14T 1,14T
>>>
>>>
>>> [root at node2 tmp]# vgs
>>>  VG         #PV #LV #SN Attr   VSize VFree
>>>>>  VolGroup00   2   3   0 wz--n- 1,63T    0
>>>
>>> Hmmm... there is no vg on node2. I restart the whole server but still no vg visible. What could be wrong?
>>>
>>> We're using Centos 5.4 with all patches installed.
>>>>>
>>> cman-2.0.115-1.el5_4.9
>>> lvm2-2.02.46-8.el5_4.2
>>> lvm2-cluster-2.02.46-8.el5_4.1
>>>
>>> Thanks in advanced and best regards,
>>>
>>> Michael
>>>
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